高考英语一轮复习Unit1Culturalrelics练习新人教版必修

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1、Unit1　CulturalrelicsⅠ.阅读理解　A　TheLeaningTowerofPisawasnotleaningwhenitwasbuiltin1173anditwasstraightlikeapole.Itstartedtoshiftdirectionsoonafterconstructionbecauseofthepoorfoundationinadditiontothelooselayerofsubsoil(底土).Atthebeginning,itleanedtothesoutheastbeforetheshakyfoundationstart

2、edtoshiftleaningtowardsthesouthwest.Aftertheperiodofstructuralstrengtheninginthebeginningof21stcentury,nowtheLeaningTowerofPisaleansatanangleof3.97degrees.In1178,theshiftindirectionwasobservedforthefirsttimewhentheconstructionhadprogressedfurthertothethirdfloor.Thetowerwasveryheavyfort

3、hethree-meterfoundationthatwasbuiltonaweakareaofland.Forcompensating(补偿)theleaningposition,thebuildersstartedtoconstructtheupperfloorswithonesidehigherthantheotherone.Thiscausedthetowertoleanintheotherdirection.Thisunusualstructureledtothetowerbeingactuallycurved.Inspiteoftheseefforts,

4、thetowerkeptonleaning.ThegovernmentofItalystartedtoplanapreventionofthecompletecollapseofthetowerin1964.However,arequestwasputforwardbytheauthoritiestokeeptheleaningpositionbecauseofthetourismindustryoftheregion.Afternearlytwodecadesofcarefulplanningbyengineers,historiansandmathematici

5、ans,thestabilizationeffortsfortheLeaningTowerofPisastartedin1990.Thetowerwasclosedforthegeneralpublicandthepeoplelivingnearbymovedaway.Forreducingthetotalweightofthetower,itssevenbellswhichrepresentedthesevenmusicalnoteswereremoved.ThetowerwasreopenedforthegeneralpubliconDecember15,200

6、1.InMay2008,afterremovinganother70metrictonsofearth,theengineersannouncedthatthetowerhadbeenfinallystabilizedanditwouldremainstableforatleast200years.1.WhydidtheLeaningTowerofPisabegintolean?　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　A.Itwastoohighlikeapole.B.Itsfoundationwasfarfromstrong.C.T

7、heworkofrepairwasdelayed.D.Itsfoundationshookbadly.2.WhendidpeoplenoticetheLeaningTowerofPisashiftitsdirection?A.Assoonasitwasconstructed.B.Attheendoftheconstruction.C.Soonaftertheconstruction.D.Inthecourseoftheconstruction.3.WhydidtheauthoritiesprefertokeeptheleaningpositionoftheLea